The high concentration of which cation contributes most to the osmolality of extracellular fluid?

A) Mg
B) KC) Na
D) Ca

C) Na

(this multiple choice question has been scrambled)

A uncentrifuged blood sample for serum basic metabolic panel (BMP) was refrigerated overnight since it missed the lab pickup time. Which analyte would most likely be affected in a clinically significant amount?

A) Glucose
B) Ca
C) Na
D) None should be significantly affectedE) K

E) K

(this multiple choice question has been scrambled)

Antidiuretic hormone (ADH, AVP, arginine vasopressin) is a hormone secreted by the

A) kidney
B) baroreceptorsC) posterior pituitary
D) adrenal cortex

C) posterior pituitary

(this multiple choice question has been scrambled)

Calcium in plasma exists in which of the following relative proportions?

-stimulates production ofaldosterone
-inhibits water reabsorption in the kidney
-inhibits sodium reabsorption in the kidney
-promotes sodium reabsorption in the kidney
-promotes water reabsorption inthe kidney
-stimulates red blood cell production